﻿#region Copyright Notice
// This file is part of GestionPedago.
// <description>
// Copyright (C) 2012 ENI Ecole Informatique
// 
// GestionPedago is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// <program> is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using GestionPedago.EntityContext;
using System.Data;
using System.Data.Objects;

namespace GestionPedago.EntityContext
{
    public abstract class EntityConnection
    {
        private static Entities context;

        public static Entities GetContext(){

            if (context == null)
            {
                context = new Entities();
            }

            return context;

        }

        public static void Reinitialisation()
        {
            context = new Entities();

        }

        public static IEnumerable<ObjectStateEntry> GetAllObjectStateEntries()
        {
            return context.ObjectStateManager.GetObjectStateEntries(EntityState.Added |
                                                        EntityState.Deleted |
                                                        EntityState.Modified |
                                                        EntityState.Unchanged);
        }

        public static void ClearEntities()
        {
            foreach (var objectStateEntry in GetAllObjectStateEntries())
            {
                context.Detach(objectStateEntry.Entity);
            }
        }


    }
}
